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About: Charactoceras     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : dbo:Species, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: ThingEukaryoteAnimalMolluscaanimaleukaryotemolluscaspecies New Facet based on Instances of this Class

Charactoceras is a tarphycerid genus cephalopod which lived during the Late Ordovician. Charactoceras has a closely coiled, rapidly expanding evolute shell, dorsally impressed, with a flattened venter and rounded sides. Sutures are close spaced laterally, but with broad ventral and dorsal lobes. Hyponomic sinus is well developed. The siphuncle is cyrtochoanitic and empty, located between the center and venter; segments expanded slightly into the chambers.